Process development by parallel operation of paraffin isomerization unit with reformer

摘要

A process for refining naphtha that results in an improved octane value in a subsequent gasoline blend. Certain embodiments include separating a naphtha feed into light naphtha and heavy naphtha; separating the heavy naphtha into a paraffin stream and non-paraffin stream; introducing the light naphtha to a first isomerization unit, introducing the paraffin stream to a second isomerization unit; introducing the non-paraffin stream to a reforming unit and combining the resulting effluents to form a gasoline blend. The resulting gasoline blend has improved characteristics over gasoline blends that are made without introducing the paraffin stream to a second isomerization unit.

主权项

1. A process for refining naphtha, the process comprising the steps of:
(a) separating a naphtha feed into a light naphtha and a heavy naphtha, wherein the light naphtha comprises paraffins having 6 or fewer carbon atoms; (b) introducing the light naphtha to a first isomerization unit under first isomerization conditions to produce a light isomerate; (c) separating the heavy naphtha into a heavy n-paraffin and a heavy non-paraffin; (d) introducing the heavy n-paraffin to a second isomerization unit under second isomerization conditions to produce a heavy isomerate; (e) introducing the heavy non-paraffin to a reforming unit under reforming conditions to produce a reformate; and (f) combining at least a portion of each of the light isomerate, the heavy isomerate, and the reformate to form a gasoline blend, wherein the gasoline blend has a target octane rating of at least 90.